Incandescent lamp with oscillating filament



Dec. 15, 1970 R. J. K YP 3,548,255

INCANDESCENT LAMP WITH OSCILLATING FILAMENT Filed larch 6, 1969 Eager 4357' 62 United States Patent Oflice 3,548,255 INCANDESCENT LAMP WITH OSCILLATING FILAMENT Robert J. Kyp, 526 Geneva Road,

. Glen Ellyn, Ill. 60137 Filed Mar. 6, 1969, Ser. No. 804,847 Int. Cl. H01k 1/18; Hb 41/16 US. Cl. 315-267 1 Claim ABSTRACT OF THE DISCLOSURE My electric light bulb has a movable filament adapted to be illuminated by AC electrical current, and a magnet positioned either within or without the envelope, but in sulficient proximity to the filament to provide direct movement of the illuminated filament, and with return movement set up by the AC current to maintain vibration of the illuminated filament, to simulate the flickering of a flame of a candle. The leads of my filament are bent downwardly toward the stem and extend inwardly to complete more of a presentation of a lighted candle at the bottom of the lighted filament. In addition to the bending of the leads, the top portion of the filament is twisted into a thin loop. This loop is so small that when the filament is illuminated, the effect is that of a pointed tip of a flaming candle.

My invention relates to the combination of an electric light bulb having a filament with a magnet to move the filament into vibration, the leads of the filament being bent so that the illuminated filament more fully simulates the flickering of a flame of a candle.

The object of my invention is to provide an oscillating illuminated filament, which simulates the flickering flame of a candle, improved to more fully present the appearance of both the bottom portion and the pointed tip of the flaming candle.

My invention also contemplates such other objects, advantages and capabilities as will later more fully appear, and which are inherently possessed by my invention.

While I have shown in the accompanying drawings a preferred embodiment of my invention, yet it is to be understood that the same is susceptible of modification and change without departing from the spirit of my invention.

Referring to the drawings, FIG. 1 is a vertical elevational view of my electric light bulb showing leads at a 45 degree angle to the magnet; FIG. 2 is a vertical elevational view turned at right angles to FIG. 1; and FIG. 3 is a detailed sectional view with the magnet turned at a 45 degree angle from FIG. 1.

The embodiment selected to illustrate my invention comprises an electric light bulb having a closed transparent elongated glass body member 11, or envelope, having at its lower portion a threaded part 12 spaced from a bottom electrical contact portion 13 by an insulated portion 14. Extending upwardly from said contact portion 13, within body member 11 is one lead 15 of filament 16. The other lead 17 of carbon filament 16 extends to threaded part 12. Leads 15 and 17 of filament 16 are attached to glass stem press 18 supported on contact portion 13 and have upper portions extending above stem press 18 to enlarged extensions 19 and 20. An elongated loop portion 21 of filament 16 extends upwardly within body member 11 and connects extensions 19 and 20.

Positioned within loop 21 in body member 11, support pin 23 has its lower end mounted centrally into stem press 18. The upper end of support pin 23 is bent to sup- 3,548,255 Patented Dec. 15, 1970 port and is spot welded to magnet 24, which is positioned at a 45 degree angle to the axis of stem press 18.

While I prefer as heretofore set forth, to house my magnet 24 within the body portion 11 of the bulb 10, yet my magnet 24 may be attached to the exterior of the bulb, and if increased in magnetic power be positioned in sufi'icient proximity to the bulb to operate the filament and make it move.

In use, when bulb 10 is screwed into an electric light socket leading to an electrical source of A.C. current, contact portion 13 receives electricity which is communicated to filament 16 to light up incandescent loop portion 21. Magnet 24 moves loop portion 21, and the electric current moves it back so that there is a continuing oscillating or vibrating of loop portion 21. This provides a moving lighted loop portion which simulates the flickering of a flame of a candle.

In my Pat. No. 3,237,053, my legs or leads 15 and 17 extended substantially upwardly and outwardly from the stem press 18. In this patented construction, when the filament was illuminated, there was a wide space at the bottom, so that the simulation of a lighted candle while good at the middle and top portion was somewhat out off and separated at the bottom.

To solve this problem, lead 17 is bent downwardly toward stern press 18 and extends inwardly past pin 23, and lead 15 is bent downwardly toward stem press 18 and extends inwardly toward lead 17 and past pin 23, so that the lower portions of filament 16 are brought closer together but without contact. When illuminated, filament 16 more fully shows the entire etfect of the flaming candle because the bottom portion appears and is not cut off as heretofore.

In addition to bending leads 15 and 17, the top of filament 16 is twisted to form thin loop 25. When filament 16 is illuminated, top loop 25 presents the appearance of the pointed tip of a flaming candle.

The bending of leads 15 and 17 provides inwardly extending portions so that the attachment of filament 16 to extensions 19 and 20, will involve less wear in the oscillating filament, and give it a longer period of operation.

Having thus described my invention, I claim:

1. An electric light bulb having a stem, 2. pair of leads mounted in said stem and having upper portions extending above said stem, a filament attached to the upper ends of said leads, said filament adapted to be illuminated when said bulb is attached to a source of AC. electrical current, a magnet positioned adjacent said filament to provide direct movement of the illuminated filament and with return movement set up by the AG. electrical current to maintain continuing vibration of the illuminated filament simulating a flickering flame of a candle, the upper portions of said leads bent downwardly and extending inwardly toward each other to bring the lower portions of said filament closer together but without contact, and the upper portion of said filament twisted to form a thin top loop, so that when said filament is illuminated, the simulation of the flame of the candle is more complete at the bottom portion and the top loop provides the simulated flaming candle with a pointed tip.

JAMES W. LAWRENCE, Primary Examiner P. C. DEMEO, Assistant Examiner US. Cl. X.R. 

